Improvement in rotary steam-engines



message strut i @itam MMM CHARLES KAISER, OF N'EW YORK,v N.

Letters Patent N o. 84,280, dated November 24, 1868.

IMPROVEMENT IN ROTARY STEAM-ENGINES.

The Schedule referred to in these Letten; Patent and making pain: of the name.

To all whom it may concern Be it known that I, CHARLES KAIsER, of N ew York, in the county and State of New York, have invented a new and useful Rotary Engine and Pump and I do hereby declare that the following is a full and exact description ofthe same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure I represents a longitudinal elevation, with the front cover removed, and

Figure II shows a horizontal section of the same.

Similar letters represent similar pz rts.

The nature of my invention consists in the arrangement of ily-valves, fitted into the circumference of the revolving piston, said valves being provided with halfcircular self-adj usting packing-pieces, and operating so as to present their end surfaces to the pressure of the air, steam, or fluid used. v

Further, in the arrangement yof two induction and of two reduction-passages, 'directly opposite each other,

so as to-cause the air, steam, or fluid to act against the end s urfacesrof the ily-valves simultaneously at the opposite sides of the revolving shaft or piston; and,

Further, in the arrangement of spring-levers, connected with the inner surfaces of the'fly-valves, and forming a parallelogram, to regulate the. opening of said valves.

In the accompanying drawings- A represents the cylinder-casing, arranged with two surrounding channels, B and D, divided by the partition G.- (See Fig. II.)

The channel B, forming the steam or induction-passage, connectswith the steam-pipe E, and the channel D, forming vthe exhaust or eduction-passage, connects with the exhaust-pipe E.

The central opening of this cylinder A is bored out oval or oblong, in the centre of which the circular piston H is 'made to revolve, supported on its shaft or axis J, running in suitable stuffing-boxes or bearings in the two covers G G, which fit tight against the ends of the piston and its fly-valves, so as to prevent any escape of steam at the ends or sides.

L L are two packing-pieces,acting against the top and bottom of the circumference of the revolving piston H,exactlyopposite each other, and forming, at the same time, abutments.

In the circumference of this revolving circular pist0n H, four ily-valves, N, N', N", and N, are arranged. These valves are made circular'at their ends c, and

upon which the same turn in corresponding circular cavities made near the circumference in the body of the piston. The end surfaces, Iv, of these valves are likewise made so as to form. a part of a circle, with the pieces c are fitted into thel outer surfaces of said valves, having curved outer surfaces, 'corresponding with the circumference ofthe inside of the cylinder A, and forming the packing for said valves against the surface of the cylinder at every position of the valves.

The end surfaces c of the valves are made of such a length that, at their greatest extent of outward motion, said surfaces will'nevcr come out of the recesses made in the piston.'

The revolving piston H being circular, and corresponding in diameter with the smallest diameter of the bore ofthe cylinder, which' latter, as before described, is bored out oval or oblong, a space is left on each side ofthe piston, into which the fly-valves are made to open, `so as to be acted upon by the pressure.

n n are passages communicating between the steamchannel B and the spaces on each side of the piston, and are situated, the one above the centre of the shaft, and the` other below thecentre, opposite each other.'

On the other side of the packing-pieces L, similar openings m m (shown in dottedlines in Fig. I) are made, forming a communication between those spaces on each side of the piston H and the exhaust-channel D.

In the central part of the piston H, spring-rods, s s' s s are arranged, acting against the inner sides of the fly-valves, and forming together a parallelogram,

whereby the closing of two valves Ais made to operate the other two valves, so as to force the same open.

These rods are made in two parts, one part fitting into the other part, and provided with small springs, (see section of rod S, Fig/1,) whereby these rods are capable of lengthening or of shortening themselves, as the case may require, to allow for any irregularity, or for the wearing away of the packing-pieces c.'

Instead of these rods, springs may be arranged, acting against the inside of the fly-valves, and bearing against the body of the piston. v

Instead of the passages a a, to form a communication for admitting the steam from the steam-channel B, against the ends of the valves, while opening outwards in the spaces at the sides of the piston, the steam may be admitted through suitable passages, made in the body of the piston, and communicatmg with suitable cavities in one or b oth of th'e 'covers G, and so arranged as to allow the steam to enter, so as to act against the ends of the ily-valves as soon as the same have passed the packing-pieces L. By this arrangement, the exhaust-passages m m may be made nearly the whole width of the piston,V and only one channel for the exhaust ste'am will be required outside the cylinder A.

,Steam being admitted, the same will, act 'simultaneously against the end surface fv of the valves N and N", which, being at the opposite sides of the shaft J, and directly opposite each other, will relieve the shaft from any undue or one-sided strain, and bring the pressure, whereby the piston H will be made to 1. The arrangement of the circular piston H. in an oblong or oval cylinder A, when said piston is provided with fly-valves, N N N"N, constructed and fitted into the circumference of the piston, substantially as described.

2. The construction and arrangement of the iiyvalves N N N N in the circumference ofthe piston H, with circular packing-pieces c near the outer ends of said valves, substantiallyY as herein set forth.

3. In combination with a circularpiston7 H, provided With ily-valves, constructed as above described, and working in an oval cylinder, the arrangement of two induction-passages a n, and of two eduetion-passages m ym, directly opposite each other, whereby to admit and exhaust the steam simultaneously, at the opposite sides oi' the revolving piston, substantially as described.

4. Rods or levers s s s', forming a parallelograni, in combination with the. fitr-valves, said levers beingr provided with spring5 substantially as setforth.

Witnesses: G HARLES KAISER.

HENRY F. Roxanne, LoUrs S'rUMM. 

